Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and apparatus for efficient photodetachment and purification of negative ion beams

a technology of electron photodetachment and purification method, which is applied in the direction of beam deviation/focusing, separation process, instruments, etc., can solve the problems of ineffective removal of isobaric contaminants in the beam, affecting the practicality of many experiments, and significant yields of contaminant species, etc., to achieve the effect of suppressing at least one contaminant and increasing the laser-ion interaction tim

Inactive Publication Date: 2008-02-26
UT BATTELLE LLC
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach significantly increases the interaction time between ions and the laser, resulting in high photodetachment efficiency and effective suppression of contaminants, improving beam purity and making it feasible for use in existing facilities.

Problems solved by technology

Unfortunately, there are many cases in which isobaric contaminants in the beam cannot be removed effectively by the magnetic separators.
Significant yields of contaminant species compromise many experiments.
[1,2] was far from practically useful due to very short interaction time (a few micro seconds) between the pulsed laser beam and fast moving negative ion beams.
When a buffer gas is introduced into the device, ions lose energy in collisions with the buffer gas molecules.
Heretofore, the requirement(s) of effective and efficient beam purification techniques referred to above have not been fully met.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for efficient photodetachment and purification of negative ion beams
  • Method and apparatus for efficient photodetachment and purification of negative ion beams
  • Method and apparatus for efficient photodetachment and purification of negative ion beams

Examples

Experimental program
Comparison scheme
Effect test

example

[0062]A specific embodiment of the invention will now be further described by the following, nonlimiting example which will serve to illustrate in some detail various features. The following example is included to facilitate an understanding of ways in which an embodiment of the invention may be practiced. It should be appreciated that the examples which follow represent an embodiment discovered to function well in the practice of the invention, and thus can be considered to constitute a preferred mode for the practice of the embodiments of the invention. However, it should be appreciated that many changes can be made in the exemplary embodiments which are disclosed while still obtaining like or similar result without departing from the spirit and scope of an embodiment of the invention. Accordingly, the example should not be construed as limiting the scope of the invention.

[0063]In a proof-of-concept experiment, this technique has been tested using stable 58Ni and 59Co negative ion...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Methods and apparatus are described for efficient photodetachment and purification of negative ion beams. A method of purifying an ion beam includes: inputting the ion beam into a gas-filled multipole ion guide, the ion beam including a plurality of ions; increasing a laser-ion interaction time by collisional cooling the plurality of ions using the gas-filled multipole ion guide, the plurality of ions including at least one contaminant; and suppressing the at least one contaminant by selectively removing the at least one contaminant from the ion beam by electron photodetaching at least a portion of the at least one contaminant using a laser beam.

Description

STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY-SPONSORED RESEARCH OR DEVELOPMENT[0001]This invention was made with United States Government support under prime contract No. DE-AC05-00OR22725 to UT-Battelle, L.L.C. awarded by the Department of Energy. The Government has certain rights in this invention.BACKGROUND INFORMATION[0002]1. Field of the Invention[0003]Embodiments of the invention relate generally to the field of photodetachment and purification of ion beams. More particularly, embodiments of the invention relate to methods and apparatus for efficient electron photodetachment and purification of negative ion beams.[0004]2. Discussion of the Related Art[0005]The Holifield Radioactive Ion Beam Facility (HRIBF) at the Oak Ridge National Laboratory is an isotope separator on-line (ISOL) facility providing high-quality radioactive ion beams (RIBs) for research in nuclear structure and nuclear astrophysics. At the Holifield Radioactive Ion Beam Facility (HRIBF), short-li...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(United States)
IPC IPC(8): H01J49/42
CPCH01J49/062
Inventor BEENE, JAMES R.LIU, YUANHAVENER, CHARLES C.
Owner UT BATTELLE LLC